[1] Univ Iowa, Dept Microbiol, Iowa City, IA 52242 USA
[2] ARS, Natl Anim Dis Ctr, USDA, Ames, IA USA
[3] Acad Sci Czech Republ, Inst Microbiol, Novy Hradek, Czech Republic
[4] S Dakota State Univ, Dept Vet Sci, Brookings, SD 57007 USA
[5] Eotvos Lorand Univ, Inst Biol, Dept Immunol, Budapest, Hungary
[6] Wake Forest Univ, Winston Salem, NC 27109 USA
[7] China Agr Univ, Coll Biol Sci, State Key Lab AgroBiotechnol, Beijing 100094, Peoples R China
[8] Abbott Labs, N Chicago, IL 60064 USA
[9] Natl Vet Serv Lab, Ctr Vet Biol, Ames, IA 50010 USA
[10] Free Univ Brussels, Cellular & Mol Immunol Lab, B-1050 Brussels, Belgium
[11] ARS, ANRI, USDA, Beltsville, MD USA
[12] Univ Iowa, Dept Pediat, Iowa City, IA 52242 USA
[13] Univ Iowa, Dept Internal Med, Iowa City, IA 52242 USA
[14] Pioneer Res, Johnston, IA USA
[15] FAL, Inst Fuer Tierzucht Tierenverhalten, Mariensee, Germany
[16] Univ Ljubljana, Zootech Dept, Domzale, Slovenia
[17] Revivicor, Blacksburg, VA USA